Directions

1. Prepare outdoor grill for direct grilling over medium-high heat. Prepare rice as label directs; cool slightly.
2. In food processor, process rice, beans, breadcrumbs, walnuts, steak seasoning, pepper and garlic powder 2 minutes or until a thick dough forms but some small pieces remain, scraping down bowl occasionally; form into 4 (1/2-inch-thick) patties.
3. In small bowl, whisk mayonnaise and steak sauce. Makes about 1/4 cup.
4. Spray both sides of onions and patties with cooking spray; place on hot grill rack. Cover and cook onions 8 minutes or until tender and lightly charred, turning once; cook burgers 10 minutes or until lightly browned, turning once. Serve burgers in buns topped with onion and mayonnaise mixture.